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Development of a survival animal model for subglottic stenosis
Author(s) -
Schweiger Cláudia,
Hart Catherine K.,
Tabangin Meredith E.,
Cohen Aliza P.,
Roetting Nicholas J.,
DeMarcantonio Michael,
Becker Elise,
Ward Jonette A.,
de Alarcón Alessandro
Publication year - 2019
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1002/lary.27441
Subject(s) - subglottic stenosis , medicine , intubation , stenosis , surgery , subglottis , airway , larynx , lumen (anatomy) , tracheal stenosis , radiology , glottis
Objective To develop a reproducible survival animal model for subglottic stenosis. Study Design Prospective study. Methods We evaluated five methods of inducing airway injury in 30 New Zealand white rabbits to produce a subglottic stenosis model. Experimental groups comprised: group 1 (n = 5), which underwent 4‐hour intubation; group 2 (n = 5), which underwent induced subglottic injury with a nylon brush; group 3 (n = 10), which underwent subglottic injury with a nylon brush, followed by 4‐hour intubation; group 4 (n = 5), which underwent subglottic injury with Bugbee cautery in 50% of the subglottic circumference, followed by 4‐hour intubation; and group 5 (n = 5), which underwent subglottic injury with Bugbee cautery in 75% of the subglottic circumference, followed by 4‐hour intubation. Five animals were used as controls. Endoscopy of the airway and sacrifice of animals were planned at an interval of 14 days postinjury. Histologic measurements were analyzed. Results No animals in groups 1 or 2 developed stenosis. In group 3, 50% of animals developed symptomatic grade 3 subglottic and tracheal stenosis, necessitating early endoscopy and sacrifice in three animals. Four animals in group 4 developed grade 1 subglottic stenosis, and four in group 5 developed grade 2 subglottic stenosis. Histologic measurements of lumen areas within each of these two groups were similar; all animals survived the follow‐up period. Conclusion We successfully developed a reproducible survival model for induced subglottic stenosis using a combination of cautery‐induced subglottic injury followed by 4‐hour intubation. This model lays the foundation for future studies that evaluate endoscopic interventions for the management of subglottic stenosis. Level of Evidence NA Laryngoscope , 129:989–994, 2019